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Nexperia USA Inc. BZX84W-B2V4-QX
- Part No.:
- BZX84W-B2V4-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B2V4-QX.pdf
- Description:
- DIODE ZENER 2.4V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,907
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Product details
Overview
BZX84W-B2V4-Q from Nexperia is a ±2 % tolerance Zener diode optimized for precision voltage regulation at 2.4 V nominal, with 600 Ω differential resistance at 5 mA, 0.9 V forward voltage at 10 mA, and AEC-Q101 qualification for automotive power rail stabilization in engine control units.
For engineers reviewing the BZX84W-B2V4-Q datasheet, BZX84W-B2V4-Q pinout, BZX84W-B2V4-Q application, or BZX84W-B2V4-Q equivalent, this device supports low-voltage reference design, ESD-protected I/O clamping, and high-frequency biasing where tight Zener voltage tolerance and low thermal drift are required.
Technical Context
This Zener operates in reverse breakdown with a nominal 2.4 V regulation voltage at 5 mA test current, exhibiting −1.6 mV/K temperature coefficient and 50 µA reverse leakage at 1 V. Its SOT323 package enables high-density placement on FR4 PCBs with 455 K/W junction-to-ambient thermal resistance.
The diode delivers 275 mW total power dissipation under standard mounting conditions and withstands non-repetitive 40 W surge pulses (100 µs), making it suitable for transient-suppressed regulator feedback paths and precision analog reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.4 V nominal at IZ = 5 mA; ±2 % tolerance ensures stable 2.35–2.45 V regulation across temperature and production lot. |
| Differential Resistance (rdif) | 600 Ω max at IZ = 5 mA; defines output impedance in regulation mode, critical for load regulation error in feedback networks. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; enables predictable forward conduction for dual-direction clamping or series bias applications. |
| Reverse Leakage (IR) | 50 µA max at VR = 1 V; low leakage preserves accuracy in high-impedance reference nodes and battery-powered circuits. |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; sets maximum continuous DC or low-duty-cycle pulse power handling capability. |
| Junction Temperature (Tj) | 150 °C max; supports operation in under-hood automotive environments with sustained thermal stress. |
| AEC-Q101 Qualified | Qualified per Automotive Electronics Council stress test standard; validated for use in automotive powertrain and body electronics. |
Pinout & Package
Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals, 1.35 mm × 1.75 mm footprint, 0.65 mm pitch, and tin-plated copper leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener regulation configuration. |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask opening required. |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and serves as regulation output reference point. |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation accuracy than ±5 % variants, reducing need for post-production trimming in safety-critical voltage references. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control modules, ADAS sensor interfaces, and infotainment power supplies. |
| 275 mW power rating on FR4 | Supports robust operation without heatsinking in space-constrained PCB layouts typical of modern ECUs and telematics units. |
| Low 50 µA leakage at 1 V | Minimizes quiescent current draw in always-on circuits such as CAN transceiver bias rails and wake-up detection networks. |
| SOT323 ultra-small footprint | Reduces board area by >40 % vs. SOT23, enabling high-density routing in multi-rail power management ICs and compact sensor modules. |
Applications
| Engine Control Unit Reference | Automotive CAN Transceiver Bias |
|---|---|
Use Scenario: Providing stable 2.4 V reference for ADC input scaling and microcontroller internal voltage monitor calibration in gasoline/diesel engine control modules. IC Role / Device Role / Timing Role: Precision Zener reference diode operating in reverse breakdown to generate fixed voltage node independent of supply ripple. Use Value: ±2 % tolerance and −1.6 mV/K temperature coefficient ensure <±15 mV drift over −40 °C to +125 °C ambient, meeting ASIL-B functional safety margin requirements. |
Use Scenario: Biasing the common-mode voltage of high-speed CAN FD transceivers in vehicle domain controllers requiring stable VIO reference. IC Role / Device Role / Timing Role: Low-leakage Zener clamp establishing regulated 2.4 V bias point for transceiver logic-level translation circuitry. Use Value: 50 µA max reverse leakage at 1 V prevents loading of weak bias sources, maintaining signal integrity during sleep/wake transitions. |
| Infotainment System ESD Clamp | ADAS Camera Module Voltage Supervisor |
Use Scenario: Protecting HDMI/MIPI D-PHY data lines in head-unit displays against IEC 61000-4-2 contact discharge events up to ±8 kV. IC Role / Device Role / Timing Role: Bidirectional clamping diode (anode-to-ground, cathode-to-line) leveraging low VF and controlled Zener knee. Use Value: 0.9 V forward voltage limits clamping overshoot during fast transients, while 275 mW Ptot absorbs multiple ESD pulses without degradation. |
Use Scenario: Monitoring 3.3 V camera sensor supply rail in surround-view systems, triggering reset when voltage drops below 2.4 V threshold. IC Role / Device Role / Timing Role: Precision undervoltage detection element feeding comparator input in discrete supervisor circuit. Use Value: Tight 2.35–2.45 V regulation window enables accurate 2.4 V trip point with <±10 mV hysteresis, eliminating need for external resistor divider. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C2V4-Q | ±5 % tolerance (2.20–2.60 V range) vs. ±2 %; identical package, power rating, and thermal specs. | Acceptable for non-critical biasing where cost sensitivity outweighs regulation accuracy requirements. | Select when system-level calibration compensates for wider voltage spread or when AEC-Q101 is not mandated. |
| MMSZ4678T1G | 2.4 V ±5 %, SOD-123 package (larger footprint), 500 mW Ptot, no AEC-Q101 qualification. | Suitable for industrial/commercial boards lacking automotive qualification needs but requiring higher surge energy handling. | Choose only for non-automotive designs where board space allows larger package and qualification is unnecessary. |
Compared with BZX84W-C2V4-Q, the BZX84W-B2V4-Q offers tighter regulation for safety-critical references; versus MMSZ4678T1G, it trades higher surge capacity for automotive qualification and smaller footprint-making it optimal for space-constrained, qualified automotive subsystems.
Availability
BZX84W-B2V4-Q is available at Aetrix Electronics and suitable for automotive engine control units, CAN transceiver bias networks, and ADAS camera voltage supervisors requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84W-B2V4-Q includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for precision voltage regulation and clamping in harsh automotive environments.
FAQ
What is the maximum continuous reverse current this Zener can handle at 2.4 V?
The BZX84W-B2V4-Q is rated for 200 mA maximum forward current, but its reverse (Zener) current capability is defined by power dissipation. At 2.4 V, the absolute maximum continuous Zener current is 114 mA (275 mW ÷ 2.4 V), assuming Tamb = 25 °C and proper PCB thermal relief.
Does the n.c. pin require any PCB layout consideration?
Pin 2 is internally not connected and must remain electrically floating. No copper pour, solder mask opening, or thermal pad should be placed under it; standard SOT323 reflow footprint (Fig. 9) specifies 0.5 mm × 0.55 mm solder paste stencil for pins 1 and 3 only.
How does the −1.6 mV/K temperature coefficient affect regulation accuracy over temperature?
Over a −40 °C to +125 °C junction temperature range (ΔT = 165 K), the Zener voltage shifts by −264 mV (−1.6 mV/K × 165 K), resulting in a final regulation value of ~2.14 V at +125 °C. This is factored into the ±2 % initial tolerance band and remains within automotive specification limits.
Can this diode be used in bidirectional ESD protection configurations?
Yes-its 0.9 V forward voltage and 2.4 V reverse breakdown enable effective bidirectional clamping when paired anode-to-ground and cathode-to-line. The 40 W non-repetitive peak power rating supports IEC 61000-4-2 Level 4 ESD events when combined with appropriate series impedance.
BZX84W-B2V4-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.4 V
- Tolerance:
- ±2.08%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-B2V4-QX FAQ
1.How can I place an order for BZX84W-B2V4-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B2V4-QX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BZX84W-B2V4-QX reliable?
The price and inventory of BZX84W-B2V4-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B2V4-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-B2V4-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B2V4-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B2V4-QX?
BZX84W-B2V4-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B2V4-QX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BZX84W-B2V4-QX?
For technical support, including BZX84W-B2V4-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B2V4-QX requirements.
6.How does Aetrix verify that BZX84W-B2V4-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-B2V4-QX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX84W-B2V4-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-B2V4-QX?
All BZX84W-B2V4-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B2V4-QX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BZX84W-B2V4-QX part is unused and in its original packaging.
Return procedure for BZX84W-B2V4-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B2V4-QX Tags
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